Plaster-board walling



March `2O, 1928.V f 1,663,219

` J. -SCHUMACHER f PLASTER BOARD WALLING' Filed March 22. 192s' fr /4 K' 7 n Stk: :wurd

Patented Mar.- 20, 19.28.

UNITED STATES late-3,219

Pernaut oFFlcE.

JOHN SGHUMACHER, oF Los ANGELES, CALIFORNIA.

PLAsTER-BOARD WALLING.

' Application sled March-22, 192s. serial 110.96353.

This invention relates to a plaster board walling. i

Heretofore, in forming walling with plaster board great difficulty has been encountered in using the walling surface as the finished interior surface of a building, due to the fact that the abutting sections of plaster board always leave an` irregular joint line, and various means that have been dea' filling or a covering which v the same fibrous material as the surface ofl vised for covering such joint line have al .ways assumed a different color than the re.-

mainder of the surface of the plaster board,

ors-walling, Vwhenever it Yis attempted to paint, glaze or otherwise surface the walling. It is an object of the present invention to provide a plaster board walling by which this difficulty may be overcome.

I' have discovered that the difliculty en- ;0, countered With-the prior attempts t0 employ a wall board surface as a finished interior surfacev has resided in the, unequal absorptive rates that have existed between the balance ofthe surface of the plaster board walling and the portion of the walling provided with a joint filling or covering material.

I have further discovered that by providing at'the joints of abutting pieces of wall board ossesses the same absorptive rate as that o the balance of the plaster board walling, the walling.

may be painted` tinted or glazed asa .whole without the walling at the joints assuming` a lighter or ,darker color, than the remainder of the walling. 'In accordance with the principles of the present invention, I provide a plaster board walling in which the surface of all the/.walling is provided with a uniform absorptive rate at the joints as well as the balance of the walling, thisbeing'l most readily and preferably accomplished by covering the joints between the adjacent pieces of plaster board with a stri of material, the surface of which, at least, 1s made of Figure 1 is a perspective fragmentary viewl of the plaster board walling embodying the lnvention.

Figure 2 is an enlarged end elevation of a joint-covering strip employed in the walling of Fig. 1.

Figure 3 isa VAfragmentary perspective of VVa modified form of walling. l Figure 4 is a further fragmentary perspective lof a further modified formof walling.

Figure 5 isa still'further modification of` a plaster board 'walling embodying the invention.l f

Referring to the drawings, first in connec-v f tion with Figs. 1 and 2, in carrying out the principles of thepresent invention, a walling is made up of sections ofv plaster board 2 which may be of any preferred or customary".

type, generally comprising a bottom fibrous covering' sheet 3 and a topfacing sheet-or fibrous covering sheet 4, incorporated between which is a hard plastic cementitious -bodyor filler 5, for example, hardened gypsum, plaster of`Paris, or other equivalent material. A The plasterboard members 2 are in thev formation of a walling such that'thei'r,

edges abut, as indicated at 6, and preferably have their top sides beveled downwardly at vtheir edges, as indicated at 7, in order to better receive a joint covering strip of mate-l rial.

8 indicates a joint covering material strip or memberwhich is laid along the joint 6 between the two plaster lboard members 2, preferably lying within the groove formed so sa by the two tapers 7 of the adjoining plaster ,boards 2 so that its 'surface 9 is even wlth the surface of the adjacent pieces of plaster board 2. The member-8 is preferably triangular in form with its `upper edges 10 coming to a fairly sharp feather edge to leave a very imperceptible meeting line'with the top sheet of fibrous covering material 4 of the plaster boards 2. This joint covering member or strip 8 should present a top surface possessing equal absorptive properties to that of the adi acent laster board sections 2; that is, they, shoul be 'coiistructedof a materialV adapted toabsorb a, stain, paint,

glazing material orthe like ata 'rateequal to that of the fibrous covering material 4 of such plaster board sections 2. This may be most readily accomplished by making 'at least the top surfacefof the joint covering strip or member 8 of the same fibrous covering material as that composmg the top covering sheet of the'plaster boar 2."v The strip 8 is indicated in its preferred form as being tapered sides 7`V of ythe plaster boards 2l through the use of glue or other adhesive. A plaster board walling formed in this manner may be painted, stained or otherwise appearing atlthe joints than at the balance Hoffthe plaster board walling.

Referring to Fig. 3, a modified form of plaster board wallingjis illustrated which colored or treated without diffeenthadessheets ll, added to the plaster board secished in a uniform color land shade, due to 65 the equal absorptive properties of the Walling surface. It is of course obvious that, if desired, the top fibrous covering sheet 4b of the plaster board sections 2b might be elimin'atodwithout substantially departing from 70 Y the principles of theA invention.

The form of the invention illustrated in Fig. wis substantially similar to that in Fig. 4, excepting thatv the fibrous covering tions 2, have their edges tapered, as indicated at 14, and the strip 8 of fibrous cover-1. J1-- ing materiall hasi'ts'edgesV 'similarlypered in order to facilitate the formation of a smaller meeting line Vbetween the fibrous covl80 ering material or strip SCand-.tlmtftuh sheets 11. It is understood, of course, that comprises a plaster board Walling made up of plaster board' sections 2n abutting to form a joint y6a, without, however, there being provided a taper at the joint 6, as in the previous embodiment of the invention. In 'order to cover the irregular' joint 6a which rials with similar rates of absorption, preferably of t-he same character of fibrous cover- 95 the sheets 1 1c and strip 8c are made of mate- YYYYYY fr would be formed by the plasterboard-sections2a and to permit the entire walling to be finished to a .uniform color or shade, the.

joint 6a is covered by a member 8, preferably in the form of a strip of fibrous covering-material possessing the sameabsorptive late as the top fibrous covering material 4? of the plaster board sections 2a. Preferably, this strip or member 8 should be pressed down or' tapered down as at 10a in order to decrease the width of its edges. This embodiment of'the invention also per'- mits, ofk the finishing of the plasterA board walling to a uniform color or shade, due to the entire walling surface being lmade to f possess the same absorptive rate.

Now referring to the embodimentof the invention shown in Fig. 4, the plaster board walling there illustrated comprlses the usual plaster board sections 2b, including the.

fibrous covering sheets 3b andfb and the hardened' cementitious filler y5b. .These plaster board sections are set edgewise abutting, providing-the `joint 6b. In addition tothe top fibrous covering sheet 4b, the plaster board has an additional fibrous coverin 11 which is placed thereon by a suitable ad esive. This fibrous covering sheet- 11 terminates ata short distance from the edges space is `covered or filled by a strip of fibrous covering material 8' havina rate of absorption similar to that of the fi rous ,cov-

ing material, so that the walling of Fig. 5 is adapted likewise to be finished to a uniform shadeor color.

While I have described the invention in its preferred forms, it is understood that.90

1.4 A plaster board walling, comprising 1 plaster board members placed in the wall with their edges abutting, and formed to provide a trough along the joint between said members, and a-cover'ing strip separate from said members vplaced in sald trough A.after said members are placed in the wall and having its surface formed of a material having the same absorptive properties as the surface of the adjacent plaster board members.

2. 'A lplaster board walling, comprising plaster boald members having a facing sheetl and a filler, and placed with their edges 110.

abuttin ,said membersformed to provide a troug at the-joint between them and a joint covering .strip plaeed`in said troughA and having a surface.v composed of the same character as that ofthe said facing sheetl of the 4adjacent plaster board members'.

' Signed at Los Angeles, California, this- 10th day of March, 1926.- JOHN scHUMAcHER. 

